The 25-year-old singer wore a flag print top and matching harem trousers with Comme des Garcon black high-top boots, as she entertained fans and paparazzi with her antics.

Rihanna also poked her tongue out as she held onto her new designer clutch, which was a gift from Vivienne Westwood. She later shared a picture of the present on Instagram, along with the caption: "Super impressive!!! Thank you to my Westwood family!!" #VivienneWestwoodLondon

She also posted a picture of her tackling security with the accessory she was calling a "cock clutch", adding: "By the look on his face.....it tickled!! #cockclutch"

She was pictured partying with close friend and model Cara Delevingne, who wore a yellow mesh top from Rihanna's newest collection for the high street store.

Rihanna also launched her latest perfume 'Rogue' at Selfridges in Central London, and informed fans on Twitter today that she is on the way to Hong Kong.

View more of today's best celebrity pictures below:

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Karen Gillan attends the Bruce Weber and David Bailey Nokia Harlem photography exhibition in London. The former Doctor Who actress shaved her head for her role in Guardians of the Galaxy.
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